/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraParameterDefinitionsSubscriberViewModel.h
Find a viewed object ownedUNiagaraScriptVariablewith a matching Id GUID, or otherwise return nullptr.
[UNiagaraScriptVariable](API\Plugins\NiagaraEditor\UNiagaraScriptVariable) * FindScriptVarById ( const [FGuid](API\Runtime\Core\Misc\FGuid) & ScriptVarId )